body{
    width: 100%;
    min-width: 320px;
    max-width: 640px;
    margin: 0 auto;
    font-size: 14px;
    font-family: -apple-system,Helvetica,sans-serif;
    color: #666;
    line-height: 1.5;
    background-color: #fff;

}
*{
    -webkit-tap-highlight-color: transparent;
}
input{
    -webkit-appearance: none;
}
img,a{
    -webkit-touch-callout: none;
}
.clearfix:after {
    visibility: hidden;
    clear: both;
    display: block;
    content: ".";
    height: 0
}

.clearfix {
    *zoom: 1
}
a{
    color: #666;
    text-decoration: none;
}
ul{
    margin: 0;
    padding: 0;
    list-style: none;
}
img{
    vertical-align: middle;
}
div{
    box-sizing: border-box;
}
.app{
    height: 45px;
}
.app ul{
    list-style: none;
    margin: 0;
    padding: 0;
}
.app ul li{
    float: left;
    line-height: 45px;
    text-align: center;
    height: 45px;
    background-color: #333333;
    color: white;

}
.app ul li:nth-child(1){
    width: 8%;

}
.app ul li:nth-child(1) img{
    width: 10px;
}

.app ul li:nth-child(2){
    width: 10%;
}
.app ul li:nth-child(2) img{
    width: 30px;
    vertical-align: middle;

}
.app ul li:nth-child(3){
    width: 57%;
}
.app ul li:nth-child(4){
    width: 25%;
    background-color: #F63515;
}

/*搜索*/
.search{
    width: 100%;
    height: 44px;
    min-width: 320px;
    max-width: 640px;
    position: fixed;
    overflow: hidden;
}
.search-btu{
    position: absolute;
    top: 0;
    left: 0;

    width: 40px;
    height: 44px;
}
.search-btu:before{
    content: "";
    display: block;
    width: 20px;
    height: 18px;
    background: url("../images/s-btn.png");
    background-size: 20px 18px;
    margin: 14px 0 0 15px;
}
.search-login{
    position: absolute;
    top: 0;
    right: 0;

    width: 40px;
    height: 44px;
    color: #fff;
    line-height: 44px;
}
.search-input{
    position: relative;
    height: 30px;
    background-color: white;
    margin: 7px 50px 0 50px;
    border-radius: 15px;
}
.search-input .jd-icon{
    width: 20px;
    height: 15px;
    position: absolute;
    top: 8px;
    left: 13px;
    background: url("../images/jd.png") no-repeat;
    background-size: 20px 15px;

}
.search-input .jd-icon:after{
    content: "";
    position: absolute;
    right: -8px;
    top: 0;
    display: block;
    width: 1px;
    height: 15px;
    background-color: #ccc;
}
.sou{
    position: absolute;
    top: 8px;
    left: 50px;
    width: 18px;
    height: 15px;
    background: url("../images/jd-sprites.png") no-repeat -81px 0;
    background-size: 200px;
}
.search-input .font{
    position: absolute;
    top: 7px;
    left: 80px;
    height: 20px;
    line-height: 1.5;

    font-size: 12px;
    color: #232326;
}
.slider img{
    width: 100%;
}

/*品牌日*/
.brand{
    overflow: hidden;
    border-radius: 10px 10px 0 0;
}
.brand div{
    float: left;
    width: 33.33%;
}
.brand div img{
    width: 100%;
}
nav{
  padding-top: 5px;

}
/*导航栏模块*/
nav a{
    float: left;
    width: 20%;
    text-align: center;
}
nav a img{
    width: 40px;
    margin: 10px 0;
}
nav a  span{
    display: block;
    font-size: 9px;
}

/*news*/
.news{
    padding-top: 20px;

}
.news img{
    width: 100%;
}
.news a{
    float: left;
    box-sizing: border-box;
}
.news a:nth-child(1){
    width: 50%;
}
.news a:nth-child(2){
    width: 25%;
    border-left: 1px solid #cccccc;
}
.news a:nth-child(3){
    width: 25%;
}